Hinged cage for grinders



May 14, 1929. A H 1 SHELTON 1,713,355 l HINGED CAGE FOR. GRINDERS Filed March 2, 1928 ATTORNEY,

Patented May 14, 1929.

l 1,713,355 PATENT OFFICE.

HARRY J. SHELTON, OF UNIVERSITY CITY, MISSOURI.

j HINGED'CAGE Fon GRINDERS.

`Application filed` March 2,

This invention relates to certain new and useful improvements in hinged gages 'for grinders for grain and' other suitable material, the peculiarities of which will be hereinafter fully described and claimed.

The main object of my invention is to provide means for readily `liftinga hinged or `Y i pivotally mounted cage to operative position after it has been lowered to change the screen; and secondly, means for holding the free end' of the cage in operative position.`

In grinding machines of the class described, arcuate screens of various size of perforations are generally used in a frame that is pivotally mounted atone end-and' 1 suitably supported at the other end in y,operf ative position, but is lowered to allow of changing the screen frequently to a different,v degree of fineness. When one screen has been replaced by another of the desired degreeof lineness the frame and its screen (constitut-- ing the cage) is general raised by handrto operative position. This` requires consider-y able effort due to the weight of the free end of the cage, and the miller has to reach intoy the casing and down under the revolving hammers or beaters to grasp the free end of the cagey and.V lift it into operative position again. l

In my present construction I `provide operating lever arms locatedoutside of the casing for operatingthe cage. Also I provide means nearly to balance the cage on its pivloted end so that little effort need be exerted claimed.

on said lever arms to lift the cage. Other advantages will be hereinafter described and In the accompanying drawing'in which like reference numerals indicate corresponding parts, i

Fig. 1 represents a vertical sectional elevation of a grinder of the class described with my improvements applied thereto; and Fig 2, a plan view of the same with thecasing above the center removed to show the cage and my improvements. y

, Referring tov the drawing,'the numeral 1 designates a horizontal shaft carrying vdiscs 2, having hammers or beaters 3 pivotally" mounted therein and constituting a revoluble cylinder that is Acarried in bearings 4.- supported by a suitable casing 5 having `an inlet hopper 6 for the material to be ground. Arcuate sides 7 with end bars 9 and 10 form a frame for a perforated screen 11 which is mounted adjacently below arcuate shoulders 192s. seriaTNO. 258,493.

12 in the casing. The frame andscreen vconstitute the cage. One end bar 9 has projecting endsv forming journals 13 mounted in the sides of the casing to constitute a pivotal mounting, so that'the cage can swing downward as indicated and the screen can be removed from its frame through anopening `in ple end of the casing having a closing door` The hinge end bar extends outside the casing andbeyond thejournals'at one or both ends, and the extension is square or otherwise adapted to be fastenedl to a lever arm 15 close to the outside of the casing and extending over the shaft towards the end of the casing (preferably) where' the door is located. 'It is preferred to have this operatinglever arm 15 in yduplicate andthe ends connected by a handle 8, readily accessible to the miller at the doorend of the i the screen. j f

In order vto lessen the effort of lifting the cage, I provide counterbalance means such as a weight^16fon an arm 17'eXtending from the hinge in opposite direction to the said lever arm 15, like adouble-arm lever, and preferably in duplicate as shown. f The weightvv (or its equivalent) "nearly balances lthe fr'ee'end of thev cage, so that the cage armfand counterbalance-when the cage isV lowered for changing its screen.-y v

The free endof the cageis held in its operative raised position by suitable means, kpreferably consisting lof a hook 18 adapted to engage the said bar 10'whe'n raised, and pivotally mounted on a rod 19 above or adjacent to the cage ybar andv carried by the side casing or otherwise so thatvthe hook` hangs in the pathof theibar 10. A'handle 20- or other means disengages the hook when the door is open. The said door backs against-the depending hook and prevents disengagement from the cage bar, when the ydoor is closed as shown. A locking bar' 21 preferably an angle, fits one flange in notches 22 in the side 'casing and holds the door Vfirmly against the hook when engaging the cage bar. The other flange of the angle closes the opening 23 `be-V casing when changing otherwise mounted, if'

The direction oit' rotation of the beaters is indicated by the arrow in Fig. l. The door is preferably located at the rear end of the casing as sliovvn, so that when Aopened and the cage lowered Afor removal ot Athe screen, the beaters are revolving downward away from the kmiller and there is less danger of material being thrown in his tace, and also from interference oft the beaters and screen by `carel ssness in changing the screen. Also while it is more convenient to have the operating lever arm accessible to the mil-ler at the door end of the casing, this arm 15 may be dispensed with and the arm 17 may be used as the operating lever in lifting the 'cage to its operative position.

I claim:

1, A grinder of theclass described comprising a shaft, a casing havinga door in one-end, a cage comprising a detachable screen and a `nipporting trametheretorh aving one end opposite to the door pivotally mounted in the casing with lateral extensionsprojecting beyond the casing, a double-armed lever fastened on each extension--one 'arm oi' each leverextending over the shafttowards the door Iand connected by a cross-bar handle and the other arm extending in the opposite direction,-counterbalance means for the cage engaging said other arm, and means tol support detachably the free end 401E the ycage at the `door end and allori7 acc-ess to the screen.

V2. Al grinderoi the class described comprisl ing a casing, an arcuate cage provided with lateral projectionsforniing journals at one end pivot-ally mounted in the casing and one of said projections extending outside thereof, and a lever arm mounted outside the-casing on the outside extension.

3. A grinder of the class described coni-` prising a casing, an arcuate cage `having an end bar journaled in the casing and extended beyond Vthe Journals and outsi de the casing, a level' vvithtWo-arms mounted on the extension of said bar outside' the casing, and means mounted on the other arm to counterbalance the free end of said cage.`

` ll. A grinder of the class rde/scribed comprisfing a casing having a door in one end, a .cage

comprising a screen and a supporting` frame havingan end bar journaled in the casing and extended outside the casing, and a lever arm outside the casing mounted on said bar extension and accessibletroin said door end of the casing for withdrawing and replacingl the screen through said door.

5. Agrinder of theclass described coinprising a casing having a Idoor in one end, a cage comprisiuga screen and a supporting trame havingr an end bar pivotally mounted in the casing opposite the door and extended outside the casing, and a lever arm outside the casing mounted on said bar extension and laving its handle end located adjacent to said c oor.

6. A` grin-der ot the class described comcage coniprisiiio an arcuate screen and sup vportingtrame iavingV an end bar pivotally mounted in the casing opposite the doorand extended outside the casing, an operating lever arm .outside the casing mounted on said bar extension and having its end located adjacent toA said door, and. means outside the casing to counterbalance the free end of said cage.

7, A grindergof the class described comprising a casing, a cage comprising an arcuate screen and supporting t aine having an end bar pivotally mounted in the casing andextended outside the casing, a lever arm mounted on the bar extension, and counterbalance means for the Ytree end of the'cage acting on said arm.

8. A grinder .of `the classdescribed comprising a casing, a cage having an end bar pivotallylmounted in the casing and having an extensionv outside the casing, a lever arm mounted on said bar extension, and an adjustable ,balance Weight for the free end of said cage mounted outside the casing` on said arm.

9. A grinder of the class described comprising a casing, a cage havingl an end bar `journaled in the casing and extended outside .counterbalance arm, substantially as described. i v l Y 10. A grinder of the class described coniprisingr a casinghaving arcuate shoulders on the sides and a Vdoor in one end, a beater shaft mounted in the casing, a cage comprising` a screen and a supportingV trame having an end bar pivotally Vmounted in the casing opposite to the door and having an outside extensionTand van operating lever arm outside the casing mounted on said extension and extending over said shaft outside and adjacent to the door, substantially vas and for the purpose described. Y

l1. A grinder of the class described coinprisinga casing having a door closing one end, a cage comprising ya screen an-d a supporting traine having an end bar pivotally mounted in the casing at the opposite end from the dooiga depending hook located above and adapted to engage the tree end of said cage and backed by the closed door and thus prevented from disengagement till said door is opened. A

12. A grinder of the class described coniprising a casing liavingry a door closingone end7 a cage comprising' an arcuate screen and supportingrlframe and having an end bar at the opposite end from said door and piv- .otallyV mounted in the casing, a depending hook` pivoted above the free end and having a handle, the hook end extending` inside the Cil casing and adapted-to engage and support the free end of said cage and held engaged by said door When c1osed,'and means to lock said door in closed position.

13. A grinder of the class described comprising a casing having a doorv closing one end, a cage' having one end pivotally mounted in the casing at the opposite end from said door and the free end spaced from and even With the top of the'door, a hook pvotally mounted above the cage and outside the casing-and depending between the door and the free end of the cage when engaged, and an angle bar having onevertical ange adapted to engage said door as a locking vbar and the opening, substantially as'described.

n testimony whereof I have affixed my k20 signature.

HARRY J. SHELTON. 

